Sidewall portion of an automobile tire



FIG. 1 is a perspective view of a sidewall portion of an automobile tire showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a fragmentary enlarged view showing the details of the sidewall portion defined by the brackets 5-5 in FIG. 2; and,

FIG. 6 is an enlarged section view taken along line 6-6 in FIG. 5.

The broken lines shown illustrate portions of the sidewall portion of an automobile tire that form no part of the claimed design. 

CLAIM The ornamental design for a sidewall portion of an automobile tire, as shown and described. 